#include <stdlib.h>
#include <stdio.h>
int getcount(int num1)
{
    int count = 0;
    int cal = num1;
    int i = 0;
    while(cal>0)
    {
        i = cal % 2;
        cal = cal / 2;        
        if(i==1)
            count++;
    }
    return count;
}
int main()
{
    int inputdata;
    scanf("%d",&inputdata);
    int g = getcount(inputdata);
    printf("%d",g);
}

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